The ornamental design for a device for converting and accumulating energy, as shown and described.
1. Device for converting and accumulating energy
1.1 : Perspective
1.2 : Perspective
1.3 : Front
1.4 : Back
1.5 : Left
1.6 : Top
1.7 : Bottom
1.8 : Perspective
Fig 1.1 is a perspective view (left, front, top) of the device for converting and accumulating energy showing the new design; Fig 1.2 is a perspective view (right, back, top) of the device for converting and accumulating energy; Fig 1.3 is a front view of the device for converting and accumulating energy; Fig 1.4 is a back view of the device for converting and accumulating energy; Fig 1.5 is a left side view of the device for converting and accumulating energy; Fig 1.6 is a top view of the device for converting and accumulating energy; Fig 1.7 is a bottom view of the device for converting and accumulating energy; Fig 1.8 is a perspective view (right, front, top) of the device for converting and accumulating energy; the right side view is omitted because it is a mirror image of the left side view.